2008年职称英语考试基础词汇重点解析(8a)
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(单词翻译:双击或拖选)

动词的各种时态及其意义

  相关背景知识介绍:

  英语是通过谓语动词的各种表现形式 -- 时态,来标明谓语动词与时间的相对关系。 e.g. She is sick. 谓语部分是一般现在时态,结合一般现在时的结构的一种语意:表示现在存在的某个客观事实,所以判断该句的含义是“她(现在)生病了”; e.g. Mary gets up at six o’clock every morning. 谓语部分是一般现在时态, 结合句子中状语结构的含义(每天早晨),判断这个的含义是“玛丽每天早晨6点起床”。从这个句子我们又了解到了一般现在时的结构的另一种语意:表示用于描述现在反复发生或习惯性的动作。
  在时态上出题也是常见的考点, 如:2005年综合C阅读判断的第一题:
  For 2,005 years, Ireland has been the best place for humans to live in.
  A. right B. wrong C. not mentioned
  1. B。 分析: 问题句的谓语部分用的是现在完成时态, 该时态表明谓语部分所表示的动作或状态是从过去某个时间开始, 一直持续到现在,并强调对现在所产生的影响。我们常常用中文中表示持续性的状语结构“一直”来翻译英语的完成时态, 所以该问题句的含义是“在2005年的时间里,爱尔兰一直是最适合人类居住的地方。” 文章中的答案相关句是:Ireland is the best place in the world to live in for 2005, according to a life quality ranking that appeared in Britain’s Economist1 magazine last week.划线结构用的是一般现在时态, 该时态用于描述在2005年的一个客观事实:“爱尔兰是2005年世界上最适合居住的地方” , 显然问题句的时态和句意内容与文章中相关句的事态和句意内容不一致, 因此判断问题句的说法错误。

  职称英语中常用的英语动词时态

  Ⅰ、一般现在时
  结构形式:
  动词be除第一人称单数用am,第三人称单数用is外,其余一律用are。
  动词have除第三人称单数用has外,其余一律用have。
  行为动词第三人称单数由动词原形+s或es构成,如learns, teaches, goes, studies等主,其余一律用动词原形。
  基本用法:
  用于表示客观事实,现在反复发生或习惯性的动作以及存在的特征、状态等,常与often, always, sometimes, usually, once a week, every day, seldom, never等时间状语连用。
  (来自2005年职称英语综合类C级词汇选项部分的句子)
  e.g. The earth moves around the sun.
  e.g. He is a physician.
  表示按计划或安排好的将来的动作,常使用arrive, be, go, start, stay等动词。
  e.g. There is a dancing party tonight.
  e.g. They arrive in Beijing tomorrow morning.
  用在时间或条件状语从句中表示将来的动作。
  e.g. When you see them, we will come to Beijing.
  e.g. If there is anything I can do for you, please let me know.
  一般现在时态否定结构:
  1) 如果谓语部分是行为动词,在构成否定结构时,需要在谓语结构中的行为动词的前面添加助动词和否定副词:主语是第三人称单数时, 所添加的助动词是does, 其他主语,则在句子中添加助动词 do。
  e.g. The earth doesn’t move around/round the moon.
  e.g. They don’t arrive in Beijing tomorrow morning.
  2) 如果谓语部分是be动词, 在构成否定结构时只需要直接在be的后面添加否定副词not。
  e.g. He isn’t a physician.
  e.g. There isn’t any paper on the desk.
  一般现在时态疑问结构:简单提一下:
  e.g. The earth moves around the sun. -- Does the earth move around the sun?
  e.g. He is a physician. – Is he a physician?
  e.g. They don’t arrive in Beijing tomorrow morning.—Don’t they arrive in Beijing tomorrow morning?
  练习与体会:
  (卫生类C/B级文章:smoking)
  (1)Smoke is a mixture of gases, vaporized chemicals, minute particles of ash and other solids. (2)There is also nicotine3, which is powerful poison, and black tar2. (3)As smoke is breathed in, (4)all those components4 form deposits5 on the membranes6 of the lungs.

  Ⅱ、一般过去时
  1. 形式
  1) 动词be除第一人称单数和第三人称单数用was外,其余一律用were。
  2) 动词have一律用had。
  3) 行为动词过去时的形式分两种:规则动词和不规则动词。前者由动词原形+(e)d构成,如worked, used, studied, stopped等,后者如made, said, wrote等,属于不规则的构成形式, 须逐个记忆。
  过去式/过去分词构成不规则的动词,常见的有:
  make –made –made;
  say – said – said
  write – wrote – written
  go – went – gone
  do– did – done
  leave –left –left
  sleep – slept – slept
  rise –rose –risen
  arise –arose –arisen
  drive --drove –driven
  drink – drunk – drunk
  take –took –taken
  put – put –put
  beat –beat – beaten
  come –came –come
  run –ran –run
  choose –chose –chosen
  give –gave –given
  cut –cut—cut
  break – broke –broken
  meet – met --met
  ring –rang –rung
  beat – beat --beaten

  一般过去时态基本用法
  用于表示过去的某时刻或某一时期内的动作或状态。常与表明过去时间的状语连用,如yesterday, then, just now, that month, two days ago, 或由when或while等引导的表明过去时间的状语从句。
  e.g. We met him last month.
  e.g. They stayed at home yesterday.
  e.g. He was a doctor.
  一般过去时态否定结构的构成:
  1) 如果谓语部分是行为动词,在构成否定结构时, 需要在谓语结构中的行为动词的前面添加助动词did和否定副词,并且需要把原来谓语部分的过去分词结构还原成动词的原形。
  e.g. We met him last month.-- We didn’t meet him last month.
  e.g. They stayed at home yesterday.—They didn’t stay at home yesterday.
  2) 如果谓语部分是be动词, 在构成否定结构时只需要直接在be的后面添加否定副词not。
  e.g. He wasn’t out yesterday.
  e.g. There wasn’t anyone in the room just now. (anyone –anybody)
  一般过去时态疑问结构:简单提一下:
  e.g. We met him last month. – Did you meet him last month?
  e.g. He was out. – Was he out?
  e.g. he wasn’t out yesterday.—Wasn’t he out yesterday?
  练习与体会:
  (2004年理工Hurricanes)
  (1)Did you know that before 1950, hurricanes had no names? (2)They were simply given numbers. (3)The first names were simply Alpha, Bravo, Charlie, etc. (4)But in 1953, female names were given because of the unpredictability (不可预知) factor of the storms.



点击收听单词发音收听单词发音  

1 economist AuhzVs     
n.经济学家,经济专家,节俭的人
参考例句:
  • He cast a professional economist's eyes on the problem.他以经济学行家的眼光审视这个问题。
  • He's an economist who thinks he knows all the answers.他是个经济学家,自以为什么都懂。
2 tar 1qOwD     
n.柏油,焦油;vt.涂或浇柏油/焦油于
参考例句:
  • The roof was covered with tar.屋顶涂抹了一层沥青。
  • We use tar to make roads.我们用沥青铺路。
3 nicotine QGoxJ     
n.(化)尼古丁,烟碱
参考例句:
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Many smokers who are chemically addicted to nicotine cannot cut down easily.许多有尼古丁瘾的抽烟人不容易把烟戒掉。
4 components 4725dcf446a342f1473a8228e42dfa48     
(机器、设备等的)构成要素,零件,成分; 成分( component的名词复数 ); [物理化学]组分; [数学]分量; (混合物的)组成部分
参考例句:
  • the components of a machine 机器部件
  • Our chemistry teacher often reduces a compound to its components in lab. 在实验室中化学老师常把化合物分解为各种成分。
5 deposits c4a993dbfb0f387e446ad5c4c6e165a3     
存放( deposit的名词复数 ); 订金; 寄存处; 储蓄
参考例句:
  • Only a small fraction of a bank's total deposits will be withdrawn at any one time. 任何时候,一家银行的总存款只有少量会被提取。
  • There are rich deposits of gold in those hills. 那些丘陵里埋藏着丰富的金矿。
6 membranes 93ec26b8b1eb155ef0aeaa845da95972     
n.(动物或植物体内的)薄膜( membrane的名词复数 );隔膜;(可起防水、防风等作用的)膜状物
参考例句:
  • The waste material is placed in cells with permeable membranes. 废液置于有渗透膜的槽中。 来自辞典例句
  • The sarcoplasmic reticulum is a system of intracellular membranes. 肌浆网属于细胞内膜系统。 来自辞典例句
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